Attestations for
  ghcr.io/boks-sh/diffutils@sha256:c54d4a8fa81cb152bb9e24cdf79682732230eaf0d99414c1211696066cb6909a

Verify them yourself:
  cosign verify-attestation --key cosign.pub \
      --type <cyclonedx|slsaprovenance> ghcr.io/boks-sh/diffutils@sha256:c54d4a8fa81cb152bb9e24cdf79682732230eaf0d99414c1211696066cb6909a

=== cyclonedx ===================================================
  (no attestation matches the document published now -- 1 older one(s) are attached)

=== slsaprovenance ==============================================
  (no attestation matches the document published now -- 1 older one(s) are attached)